In one of the ostream tests we attempt to validate whether the output of
%p is correct. This is actually outside the scope of libc++, for the
%reason that the format of %p is implementation defined. Change the test
%to validate that the output of %p is non-empty and is different when
%given two unequal addresses.
Differential Revision: http://reviews.llvm.org/D8354
Reviewed by: marshall
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@232390 91177308-0d34-0410-b5e6-96231b3b80d8
